This 3S 20A 18650 Lithium Battery Protection Board comes with a recovery function-AUTO Recovery. It is suitable for the drills with starting current below 80A, power 135W below. It provides a continuous discharge of 20A, 100mA balanced current, for electric drill, sprayer, LED lights, or low power inverter. Reduce the load current use if the cooling method is not so good. It is best suitable for nominal voltage 3.6V 3.7V lithium battery(Including 18650,26650, lithium polymer batteries). Please check the circuit diagram shown in the image for battery connection.